How Long to Boil Hard Boiled Egg
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How long to cook hard-boiled egg?
Times given for: jajko rozmiaru M (53–63 g).
- Selected method
- Boiling water, cold egg from fridge — 9–10 min
- Conditions for which this time applies
- pot uncovered, water at a rolling boil, egg from the fridge, cooled in cold water afterwards
- Effect
- yolk set, still without a grey ring
The timer counts down in the browser - it does not send anything to the server.
By default, the stopwatch takes the center of the fork of the selected method. Your own time is useful when you know your equipment or are cooking a different batch size.
How to tell if hard-boiled egg is ready
- Spun on the worktop it turns smoothly and for a long time, like a top.
- Cut open, the yolk is matt and uniform, with no moist, darker centre.
- A grey-green ring around the yolk means the egg cooked several minutes too long.
Common errors
- Boiling hard the whole time - the shells crack as the eggs knock against the bottom.
- Skipping the cold-water shock: the egg keeps cooking and the membrane sticks to the white.
- Dropping cold eggs into violently boiling water without pricking the blunt end - more cracks.
What changes the time
- Egg size: XL requires about one minute longer than M.
- Number of eggs: adding multiple eggs at once lowers water temperature for over a minute.
- Altitude above sea level (a lower boiling point).
Water boils at 100 °C only at normal pressure at sea level. The boiling point drops by roughly 1 °C for every ~300 m of altitude, so at 850 m water boils at about 97 °C, and at 2000 m at about 93 °C. A lower temperature means longer cooking: in the mountains add roughly 5-10% to the time for every 500 m, and more than that for pulses.
Salt raises the boiling point by an amount that is practically irrelevant (a few hundredths of a degree per tablespoon in a litre), so it does not shorten cooking. It matters for taste and texture: pulses salted at the start turn hard, which is why salt goes in at the end.
Food safety - fact, not advice
A hard-boiled egg has both white and yolk set, so it meets the food safety guidance for eggs. Keep a cooked egg in the fridge and use it within a week; do not leave it at room temperature for more than two hours.
Source: FoodSafety.gov (USDA/FDA), „Safe Minimum Internal Temperatures”
Time base for this item: Standard culinary practice (cookbooks and manufacturer instructions). We provide ranges as ranges because the result depends on the portion size, equipment and variety of raw material - not as a single number that no one can confirm.
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Other tools you may find usefulHow long to hard-boil an egg?
Hard-boiled eggboils9-10 min- this is the variant "Put into boiling water, egg from the fridge". The entire spread for this item, from the shortest to the longest method, is 8-13 minutes, because different degrees of cooking and different processing methods mean really different times. The times below refer to a serving: size M egg (53-63 g). The stopwatch on this page counts down in your browser, so you can turn it on and put your phone next to the pot.
We provide ranges, not one number. Portion size, variety, equipment, and altitude shift the result enough that "a hard-boiled egg takes exactly that many minutes" would be a fictitious precision. Readiness indicators are more reliable than a watch - we describe them below.
Cooking times: hard-boiled egg, method by method
| Method / degree of cooking | Time | Conditions for which this time applies | Effect |
|---|---|---|---|
| Put into boiling water, egg from the refrigerator | 9-10 min | uncovered pot, strongly boiling water, egg from the fridge, tempered in cold water after boiling | yolk set, still without the gray rim |
| From cold water (counted from boiling) | 8–9 min | egg in cold water, time counted from the first boiling, cooking over low heat | yolk set straight through |
| Very hard, for stuffing and paste | 11–12 min | put into boiling water, pot uncovered | yolk firm and crumbly, gray rim possible |
| Steamed covered | 11–13 min | strainer over boiling water, pot covered | set yolk, easier to peel |
The "conditions" column is not a decoration: the same time with a different start gives a different result. The table clearly states whether the hard-boiled egg should be placed in cold or boiling water, whether the pot is covered and how much water should be above the product. Time without these conditions means nothing.
Cold water or boiling water - and when to add salt
The start has two meanings. Putting it incoldwater equalizes the temperature throughout the volume and works well where the center is far from the surface - otherwise the edge will fall apart before the center softens. Throwingintoboiling water gives a shorter and more repeatable time, because the countdown starts from a known temperature. For hard-boiled eggs, the correct start is given in the "conditions" column for each variant separately, because different methods start differently.
Salt raises the boiling point almost insignificantly (a few hundredths of a degree per tablespoon per liter), so it does not shorten the cooking time. It is important for taste and texture: salted legumes harden at the beginning, so salt is added at the end.
How to tell when a hard-boiled egg is ready
- When twisted on the counter, it spins evenly and for a long time, like a spinning top.
- When cut, the yolk is dull and uniform, without a moist, darker center.
- A grey-green rim around the yolk is a sign that cooking was a few minutes too long.
These indicators override the watch. The watch tells you when to start checking; the fork, knife and appearance tell you when to remove from the heat.
Common mistakes when cooking eggs
- Cooking over high heat all the time - the shells crack from hitting the bottom.
- Skip tempering: the egg continues to cook and the film sticks to the egg white.
- Putting cold eggs into rapidly boiling water without piercing them with a blunt end causes more cracking.
What advances time: size, quantity, equipment, height
- Egg size: XL takes about a minute longer than M.
- Number of eggs in the pot - six eggs dropped in at once lowers the temperature of the water for over a minute.
- Altitude above sea level (lower boiling point).
The amount in the pot depends on temperature, not mass: pouring a large portion into a small amount of boiling water lowers the temperature and the water must return to a boil before the time in the table takes effect. Therefore, when making a double portion, it is better to use a larger pot and more water than to add minutes blindly. Start the countdown from the moment you return to the boil, not when you add the eggs to the water.
Water boils at 100 °C only at standard sea level pressure. The boiling point drops by about 1 °C for every ~300 m of altitude, so in Zakopane (≈850 m) water boils at ≈97 °C, and on Kasprowy Wierch (≈1987 m) at ≈93 °C. Lower temperature means longer cooking time: in the mountains, add about 5-10% of the time for every 500 m, and even more for legumes.
Food safety
A hard-boiled egg has set protein and yolk, which means it meets the safety guidelines for eggs. Store the cooked egg in the refrigerator and use within a week; don't leave it at room temperature for more than two hours.
Source of this information:FoodSafety.gov (USDA/FDA), "Safe Minimum Internal Temperatures". This is a fact about heat treatment, not health advice - when in doubt, the thermometer decides, not the time on the stopwatch.
Where do these tenses come from
The tenses for this item are based on: Established culinary practice (cookbooks and manufacturers' instructions). Where food safety is involved, we refer to and link to the tables of food safety institutions. If there is a different time on the packaging of your product, the packaging takes precedence - the manufacturer knows his raw material, its grinding and pre-processing, and we describe the general scope. The tool above allows you to enter your own time and count it down with a stopwatch.